all view speed range for video ?

all view speed range for video ?

I would like to use allview for video panning. Can anyone give the range of speed for this use. Can i Use at 1°/S or less ? Is it really fluid et a such speed ?

Thanks

M

Posted: Sat Aug 24, 2013 12:23 pm

by klausesser

Hi!

I donÂ´t have an Allview. But what i generally know from using astro-heads for video: their moves are by far not fluid enough. They all need a modified controlling software with variable speed-ramps for start and stop and programmable speed for the movements.

All heads "from the box" start and stop too abruptly for video use and donÂ´t provide variable and programmable speedcontrol.

Yeps, that's true you can use a Merlin/Allview for timelaps shots but not for real life motion shots for that you need a controler with an Atmel chip (for instance) and a program which can accelerate/decelerate the steppers using differential microstepping. For one a Merlin doesn't use steppers but rotary controllers controlled standard electro motors which would/could have some implications trying to control them (what an Allview uses I don't have a clue). I don't know if a Kessler Oracle (I wonder what's Larry Ellison's view of that name is when he comes back from his yachting adventure ) controler would be able to control an Allview, but I shure know that a Kessler motorized mount and controler will do the trick.

Is willing to help since he own's and uses Kessler and and Allview though for timelaps and not for real life 24 FPS speed.

Greets, Ed.

Posted: Sun Aug 25, 2013 12:25 pm

by mediavets

Artisan New wrote:For one a Merlin doesn't use steppers but rotary controllers controlled standard electro motors which would/could have some implications trying to control them (what an Allview uses I don't have a clue). Greets, Ed.

I believe that the Allview can be driven by Papywizard using the Merlin driver plugin so I presume it also uses optical encoders and DC motors.

Posted: Sun Aug 25, 2013 12:30 pm

by mdboi

Yes it can and can use the android application it'es the same system than the merlin. Do you think that if I am linear with only panning and no stop I will be ok or I will have some vibrations ?

Posted: Sun Aug 25, 2013 12:37 pm

by klausesser

mdboi wrote:Do you think that if I am linear with only panning and no stop I will be ok or I will have some vibrations ?

Well - your panning must start and stop, does it. But you can start and stop it and cut away some frames which show the start- and stop. So you can fade in a soft start and fade out getting a soft stop.But youÂ´ll most likely have vibrations in the panning on between.

best, Klaus

PS: some months ago here in the forum some guys showed a remote-pan device for Merlin basing on a Sony PS controller and an Arduino interface.Seemed to work nicely!

So i guess the Merlin is a very fine solution for amateurs. After all you can run stabilizing/smoothing in post-pro.

Klaus

Posted: Sun Aug 25, 2013 3:52 pm

by phill.butte

I'm out of town right now but I can test this when I get back next week. As I recall from the manual you set a start point, an end point, and the amount of time to take between start and end. So it's not fast to set up and there's no option to ramp the speed up and down.

The answer to the original question is a qualified yes. It will pan as fast or slow as you want at a constant speed. they call it "Video Coursing". You set the starting pan and tilt location, then the ending pan and tilt location, then the amount of time you want it to take from start to end up to 9 hours, 59 minutes, and 59 seconds. It moves very smoothly and a constant rate, there is no capability to ramp the speed up or down. It's very good at moving slowly, there is a top speed limit of about 10 degrees per second. During the duration of the pan/tilt the camera shutter control signal is "on".

There is also a "Time Lapse" mode that requires setting a starting point, ending point, the time between each photo (Maximum 9 hours, 59 minutes, and 59 seconds), the duration of the camera shutter control "on" signal, and the number of photos to be taken during the total pan/tilt (max 65,535). There does appear to be some practical limits on how many positions there can be per degree. If you tell it to take 100 photos over a ten degree range then put your finger on the drive it feels like it moves only about every 10 photos (.1 degree). It uses encoders rather than a stepping motors so there are limits on the resolution.